moron Definition

moron
noun

1. derog, colloq
A very stupid person.
Thesaurus: imbecile, simpleton, dullard, dunce, cretin, idiot, dolt, dimwit, halfwit, boob (US slang), ass (slang), bonehead (slang); Antonym: philosopher, sage, genius.
2. old use, now very offensive
A person with a mild degree of mental handicap.

Derivative: moronic

colloq
Stupid; foolish.
Thesaurus: asinine, foolish, mindless, simple, thick, stupid, unintelligent.

old use
Like or characteristic of a moron.

Derivative: moronically
adverb

Etymology: Early 20c: originally US, from Greek moros foolish.